CN116084905A - Sand blaster for oilfield stratum fracturing - Google Patents
Sand blaster for oilfield stratum fracturing Download PDFInfo
- Publication number
- CN116084905A CN116084905A CN202310235016.XA CN202310235016A CN116084905A CN 116084905 A CN116084905 A CN 116084905A CN 202310235016 A CN202310235016 A CN 202310235016A CN 116084905 A CN116084905 A CN 116084905A
- Authority
- CN
- China
- Prior art keywords
- hole
- sliding sleeve
- joint
- step hole
- sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004576 sand Substances 0.000 title claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 238000005488 sandblasting Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 13
- 239000002195 soluble material Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 4
- 239000007788 liquid Substances 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 abstract 2
- 230000036346 tooth eruption Effects 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
- E21B34/142—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools unsupported or free-falling elements, e.g. balls, plugs, darts or pistons
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A sand blaster for fracturing an oilfield stratum relates to the technical field of oilfield downhole tools. The upper joint and the lower joint are connected with the central pipe, a piston is arranged between the upper joint and the central pipe, a piston is arranged between the lower joint and the central pipe, the central pipe is provided with a liquid inlet, the upper part of the lower piston on the outer circle of the central pipe is sleeved with a conical sleeve with the diameter reduced upwards, the conical surface of the conical sleeve is provided with four lower dovetail groove guide rails with the circumference uniformly distributed, and the four lower dovetail groove guide rails of the conical sleeve are connected with four cutting teeth. The beneficial effects of the invention are as follows: the movement track of the cutting edge is controlled by arranging the upper dovetail groove guide rail and the lower dovetail groove guide rail, the compression spring is arranged as a power source for resisting the switching of drilling fluid pressure and the retraction of the cutting edge, the opening of the cutting edge can be completed for reaming operation by throwing a ball to boost pressure, the outer diameter of a drilling tool can be changed by throwing a soluble ball once, the cutting teeth are extended for reaming operation, the reaming operation can be repeatedly performed, the operation is simple, the operation conversion time is short, and the operation cost is saved.
Description
Technical Field
The invention relates to the technical field of oilfield downhole tools, in particular to a sand blaster for oilfield stratum fracturing.
Background
The sand blaster is a downhole tool commonly used in oilfield production, in production practice, a plurality of layers are required to be sandblasted under Shan Jingjing, however, most of the existing sand blasters only can realize single-layer sand blasting, if the sand blasting operation of other layers in a single well is required to be completed, the sand blasting operation is required to be realized in a manner of lifting a pipe column, and the operation process is very complex; when a common sand blaster is used for throwing balls into the sand blaster for pressurizing, the sliding sleeve descends from the bottom, when the sand blasting holes are just exposed, fracturing fluid enters the stratum from a gap between the sand blasting holes and the top of the sliding sleeve, at the moment, fracturing sand easily enters a space between the sliding sleeve and the sand blaster body to clamp the sliding sleeve, and the sand blasting holes cannot be completely opened to influence the fracturing effect; in addition, after the sliding sleeve is opened by ball throwing and pressure holding in actual production, the sliding sleeve loses constraint and can move up and down in the sand blaster, when underground well liquid is reversely slurred, the sliding sleeve can surge together with the well liquid, so that the opened sand blasting hole is sealed, and the whole fracturing process is seriously influenced.
Disclosure of Invention
The invention provides a sand blaster for oil field stratum fracturing, which aims to solve the problems that the existing sand blaster can only perform single-layer sand blasting, the construction period is long and the operation is complex when performing multi-layer sand blasting.
The technical scheme provided by the invention is as follows: a sand blaster for oil field stratum fracturing, includes top connection and lower clutch, and top connection and lower clutch pass through screw thread, sealing washer and pin connection, and the hole processing of top connection becomes two step holes: go up step hole and step hole down, go up the step hole in clearance fit connection outer sliding sleeve, go up the step hole and be equipped with the sand blasting hole in outer sliding sleeve upper portion position, be equipped with the sealing washer between outer sliding sleeve and the outer sliding sleeve in sand blasting hole both sides, the inboard clearance fit connection inner sliding sleeve of outer sliding sleeve, outer sliding sleeve and go up the step hole and pass through deblocking pin B and connect, the inner sliding sleeve passes through deblocking pin A with the upper joint and is connected, inner sliding sleeve upper portion processing has the ball seat hole, the processing of inner sliding sleeve excircle middle part one section step axle, step axle bottom is the pressure disk, pressure disk and step hole clearance fit connection down, outer sliding sleeve lower part passes through bolted connection fender dish, the hole and the step axle clearance fit connection of fender dish, be equipped with compression spring between the top in fender dish and the step hole down.
The outer circle of the pressure plate is provided with a clamp spring groove, a clamp spring is arranged in the clamp spring groove, and the lower step hole is provided with a ring groove at the lower side of the pressure plate.
A sealing ring is arranged between the inner sliding sleeve and the upper joint, sealing rings are arranged on two sides of the clamp spring groove between the pressure plate and the lower step hole, a through hole is formed between the clamp spring groove and the inner hole of the inner sliding sleeve by the pressure plate, soluble materials are filled in the through hole, the clamp spring is made of soluble metal, the inner hole of the lower joint is smaller than the lower step hole, a compression spring is arranged on the lower side of the pressure plate in the lower step hole, and the diameter of the compression spring is larger than that of the inner hole of the lower joint.
The baffle disc is of a split structure.
The beneficial effects of the invention are as follows: through setting up inner sliding sleeve and outer sliding sleeve interact, can realize that the sandblast hole is opened completely, avoid ordinary sandblast ware sandblast hole not open completely when, the fracturing sand blocks the sliding sleeve, can also with interior sliding sleeve axial location, interior sliding sleeve hooks the fender dish of outer sliding sleeve through the pressure disk, outer sliding sleeve can not shift up, avoid ordinary sandblast ware when the well liquid in pit is reverse thick liquid, the sliding sleeve can be together upwelled along with the well liquid, make the sandblast hole that has been opened sealed when, after the fracturing, the inner sliding sleeve can seal the sandblast hole, can carry out the lower pressure fracturing, the multilayer fracturing can be accomplished to the tubular column of next time, reduce operation time and cost.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
In the figure: the device comprises a 1-upper connector, a 2-lower connector, a 3-sand spraying hole, a 4-inner sliding sleeve, a 5-outer sliding sleeve, a 6-baffle disc, a 7-annular groove, an 8-ball seat hole, a 9-step shaft, a 10-pressure disc, an 11-clamp spring groove, a 12-clamp spring, a 13-through hole, a 14-lower step hole, a 15-upper step hole, a 16-unclamping pin A and a 17-unclamping pin B.
Detailed Description
As shown in fig. 1, a sand blaster for fracturing an oilfield stratum comprises an upper joint 1 and a lower joint 2, wherein the upper joint 1 and the lower joint 2 are connected through threads, a sealing ring and a pin, and an inner hole of the upper joint 1 is processed into two step holes: the upper step hole 15 and the lower step hole 14 are connected with the outer sliding sleeve 5 in a clearance fit manner in the upper step hole 15, the outer sliding sleeve 5 is connected with the upper step hole 15 through a deblocking pin B17, the sand spraying hole 3 is arranged at the upper position of the outer sliding sleeve 5 in the upper step hole 15, sealing rings are arranged on two sides of the sand spraying hole 3 between the upper step hole 15 and the outer sliding sleeve 5, the inner sliding sleeve 4 is connected with the inner sliding sleeve 4 in a clearance fit manner in the inner side of the outer sliding sleeve 5, the inner sliding sleeve 4 is connected with the upper joint 1 through a deblocking pin A16, a ball seat hole 8 is machined in the upper portion of the inner sliding sleeve 4, a section of step shaft 9 is machined in the middle of the outer circle of the inner sliding sleeve 4, the bottom of the step shaft 9 is provided with a pressure plate 10, the pressure plate 10 is connected with the lower step hole 14 in a clearance fit manner, the lower part of the outer sliding sleeve 5 is connected with the baffle disc 6 through bolts, and a compression spring (in the figure) is arranged between the inner hole of the baffle disc 6 and the top of the step shaft 9.
When fracturing, throw into soluble ball to ball seat hole 8, the pressurization is cut off deblocking pin A16 in the tubular column, promote interior sliding sleeve 4 decline, the pressure disk 10 of interior sliding sleeve 4 drives fender dish 6 on the outer sliding sleeve 5 and descends, cuts off deblocking pin B17, outer sliding sleeve 5 descends under compression spring's effect, sand blasting hole 3 exposes completely, when avoiding ordinary sand blasting ware sand blasting hole not exposing completely, fracturing sand gets into easily between sliding sleeve and the sand blasting ware body, blocks the sliding sleeve, influences the sand blasting effect.
The clamp spring groove 11 is formed in the outer circle of the pressure plate 10, the clamp spring 12 is mounted in the clamp spring groove 11, the annular groove 7 is formed in the lower side of the pressure plate 10 through the lower step hole 14, after the inner sliding sleeve 4 descends, the clamp spring 12 enters the annular groove 7 to position the inner sliding sleeve 4, and the situation that when the underground well liquid of a common sand blaster is reversely slurried, the sliding sleeve can surge along with the well liquid together, so that the opened sand blasting hole 3 is sealed.
A sealing ring is arranged between the inner sliding sleeve 4 and the upper joint 1, sealing rings are arranged at two sides of a clamp spring groove 11 between a pressure plate 10 and a lower step hole 14, a through hole 13 is formed between the clamp spring groove 11 and an inner hole of the inner sliding sleeve 4 by the pressure plate 10, soluble materials are filled in the through hole 13, the clamp spring 12 is made of soluble metal, the inner hole of the lower joint 2 is smaller than the lower step hole 14, a compression spring is arranged at the lower side of the pressure plate 10, the diameter of the compression spring is larger than that of the inner hole of the lower joint 2, after the fracturing of the pressure plate is finished, a period of time is waited, soluble materials in the through hole 13 are dissolved, fracturing fluid enters the clamp spring groove 11, the clamp spring 12 is dissolved, the inner sliding sleeve 4 moves upwards under the action of the compression spring below, the sealing rings on the upper side and the lower side of the inner sliding sleeve 4 seal the sand spraying hole 3, and then the lower layer can be fractured.
The baffle disc 6 is of a split structure, and is convenient to assemble.
Claims (4)
1. A sand blaster for oilfield formation fracturing, comprising an upper joint (1) and a lower joint (2), characterized in that: the upper joint (1) and the lower joint (2) are connected through threads, a sealing ring and a pin, and an inner hole of the upper joint (1) is processed into two step holes: go up step hole (15) and step hole (14) down, go up step hole (15) internal clearance fit and connect outer sliding sleeve (5), outer sliding sleeve (5) and go up step hole (15) are connected through deblocking pin B (17), go up step hole (15) and be equipped with sand blasting hole (3) in outer sliding sleeve (5) upper position, go up step hole (15) and outer sliding sleeve (5) between sand blasting hole (3) both sides are equipped with the sealing washer, outer sliding sleeve (5) inboard clearance fit connects inner sliding sleeve (4), inner sliding sleeve (4) are connected through deblocking pin A (16) with top connection (1), inner sliding sleeve (4) upper portion processing has ball seat hole (8), one section step axle (9) are processed at inner sliding sleeve (4) excircle middle part, step axle (9) bottom is pressure disk (10), step hole (14) clearance fit down are connected, outer sliding sleeve (5) lower part is through bolted connection fender dish (6), the hole and step axle (9) clearance fit connection between fender dish (6) and lower step hole (14) are equipped with compression spring.
2. A sand blaster for oilfield formation fracturing according to claim 1, wherein: the outer circle of the pressure plate (10) is provided with a clamp spring groove (11), a clamp spring (12) is arranged in the clamp spring groove (11), and the lower step hole (14) is provided with a ring groove (7) at the lower side of the pressure plate (10).
3. A sand blaster for oilfield formation fracturing according to claim 1, wherein: be equipped with the sealing washer between interior sliding sleeve (4) and upper joint (1), be equipped with the sealing washer in jump ring groove (11) both sides between pressure disk (10) and lower step hole (14), open between the hole of jump ring groove (11) and interior sliding sleeve (4) pressure disk (10) has through-hole (13), the intussuseption of through-hole (13) is filled with soluble material, jump ring (12) are made by soluble metal, the hole of lower joint (2) is less than lower step hole (14), compression spring is installed at pressure disk (10) downside in lower step hole (14), the diameter of this compression spring is greater than the hole of lower joint (2).
4. A sand blaster for oilfield formation fracturing according to claim 1, wherein: the baffle disc (6) is of a split structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310235016.XA CN116084905B (en) | 2023-03-13 | 2023-03-13 | Sand blaster for oilfield stratum fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310235016.XA CN116084905B (en) | 2023-03-13 | 2023-03-13 | Sand blaster for oilfield stratum fracturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116084905A true CN116084905A (en) | 2023-05-09 |
| CN116084905B CN116084905B (en) | 2023-07-18 |
Family
ID=86200935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310235016.XA Active CN116084905B (en) | 2023-03-13 | 2023-03-13 | Sand blaster for oilfield stratum fracturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116084905B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2777197Y (en) * | 2004-10-25 | 2006-05-03 | 中国石油化工股份有限公司中原油田分公司井下特种作业处 | Completion well sliding casing sand blower |
| CN102345452A (en) * | 2010-08-05 | 2012-02-08 | 新疆华油油气工程有限公司 | Self-formed ball seat sliding sleeve |
| US20140182838A1 (en) * | 2012-12-28 | 2014-07-03 | Cnpc Bohai Drilling Engineering Company Limited | Multi-level sliding sleeve |
| CN105822278A (en) * | 2016-05-20 | 2016-08-03 | 中石化石油工程技术服务有限公司 | Equal-drift-diameter staged fracturing device and method |
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| CN110080719A (en) * | 2019-03-25 | 2019-08-02 | 中国石油集团长城钻探工程有限公司 | A kind of solvable pressure difference sliding sleeve and horizontal well naked eye staged fracturing construction method |
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| CN112324387A (en) * | 2020-11-30 | 2021-02-05 | 中国石油集团渤海钻探工程有限公司 | But take one-way earial drainage function's switch sandblast sliding sleeve |
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| CN113914832A (en) * | 2021-12-15 | 2022-01-11 | 东营市福利德石油科技开发有限责任公司 | Horizontal well full-drift-diameter infinite-stage fracturing tool |
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-
2023
- 2023-03-13 CN CN202310235016.XA patent/CN116084905B/en active Active
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| CN102345452A (en) * | 2010-08-05 | 2012-02-08 | 新疆华油油气工程有限公司 | Self-formed ball seat sliding sleeve |
| US20140182838A1 (en) * | 2012-12-28 | 2014-07-03 | Cnpc Bohai Drilling Engineering Company Limited | Multi-level sliding sleeve |
| US20210189833A1 (en) * | 2016-01-20 | 2021-06-24 | China Petroleum & Chemical Corporation | Novel sliding sleeve |
| CN105822278A (en) * | 2016-05-20 | 2016-08-03 | 中石化石油工程技术服务有限公司 | Equal-drift-diameter staged fracturing device and method |
| US20200173255A1 (en) * | 2018-12-03 | 2020-06-04 | Abd Technologies Llc | Flow transported obturating tool and method |
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| CN211549665U (en) * | 2020-01-20 | 2020-09-22 | 松原市胜源宏石油技术服务有限公司 | Shot fracturing sliding sleeve sand blaster |
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| CN115680547A (en) * | 2022-11-11 | 2023-02-03 | 中国石油天然气集团有限公司 | Combined type setting back pressure valve device, tool pipe string and application thereof |
| CN115506738A (en) * | 2022-11-23 | 2022-12-23 | 大庆市璞庆钻采设备制造有限公司 | Hydraulic anchor for oil field downhole operation |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN116084905B (en) | 2023-07-18 |
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